I realize the polarizer provides other features aside from ND, but it was a recommendation from my GL2 dealer, so I thought I'd put it out there. I'm guessing that most of us shoot outdoors, and so there is a lot of experience with ND out there. Thoughts??

A polarizing filter is essentially a color control instrument. While it does affect exposure, that is not its purpose. Use the onboard ND filter to control your base exposure range and the polarizer to control color saturation on sunny outdoor shoots.

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That leads me to a question. I have a circular polarizing filter for each of my GL2's, but I have yet to actually use one on a project because I'm not sure how to use them. Do you just screw it on, and then rotate the filter to get the look you want? Are there situations other than bright, sunny days where you would recommend a circular polarizing filter?

And to respond to the original question, I use the onboard ND filter and it seems to work just fine.

Thread hijacking? The posts previous to mine (including yours Ken, and the post after mine) were discussing polarizing filters. I just wanted to clarify when you guys used them and how . . . but whatever.